Garage
Shop

See all parts that fit your 2003 Neon

NVX NE121P w/ Sundown Audio SAV312D2

Single 12" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 1.75 Cu. Ft. with Polyfil and NVX Logo w/3000W Peak (1500W RMS) 12" SA Series Dual 2-ohm Subwoofer

NVX
Shop all NVX
highlight-star-icon

• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.75 cubic feet
• Premium Black Carpet with Black NVX Logo

Learn more about the ne121p_sav312d2
Universal fit Icon

Universal – fits most vehicles.

Similar items | Update vehicle | Vehicle store
List price $635.98
Thanks , You Pay:
-15%

$539.55

 with warranty
Starting at $49/mo with

Heads up

Your vehicle can use this product in multiple locations. Only a quantity of one can be selected from the product page. You will have the option to adjust the quantity within your cart.

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Quantity
In Stock
Brand new

Buy it now


Acima Logo

No Credit Option

Flexible Lease Payments

Early Purchase Options

Quick Approval Decision

Extend logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Hassle-free immediate replacement within minutes!
  • Easy online claims 24/7
  • Covers product breakdowns and failures
Swoosh Icon Icon of Swoosh

For over 25 years, we've been your X-Factor – the team dedicated to having the biggest impact on your shopping experience!

Award winning icon
Award-Winning Service
Shipping icon
FREE Shipping Orders $49+
60 days return policy icon
60-Day Easy Returns
lowest price guarantee icon
Guaranteed Lowest Price
inHouseExpert
In-House Experts

Loading...
Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

122
-33.36%

$79.96

List price $119.99

43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

28
-10.53%

$84.99

List price $94.99

SXE-6926S main

Alpine SXE-6926S

280W Peak (90W RMS) 6x9” SXE Series 2-way 4-ohm Coaxial Speakers

13
-20.84%

$56.99

List price $71.99

NSP65 main

NVX NSP65

540W Peak (180W RMS) 6.5" N-Series 2 Way Coaxial Car Speakers

93
-35.19%

$69.99

List price $107.99

NSP69 main

NVX NSP69

900W Peak (300W RMS) 6x9" N-Series 2 Way Coaxial Car Speakers

53
-16.67%

$89.99

List price $107.99

P1694 main

Rockford Fosgate Punch P1 P1694

300W Peak (150W RMS) 6x9" Punch Series 4 Way Coaxial 4-ohm Speakers

54
XRM59BT main

Dual XRM59BT

Single DIN Digital Media Receiver with Bluetooth, USB and Aux

28
KMM-BT732HD main

Kenwood KMM-BT732HD

Single DIN Digital Media Bluetooth Receiver with HD Radio

3
-14.09%

$189.00

List price $220.00

460BRGB main

Boss Elite 460BRGB

Single DIN Digital Media Receiver with Bluetooth (Black)

8
Limited time!
CELEBRITY 100 main

JBL CELEBRITY 100 (JBLCELEBRITY100)

Single DIN Digital Audio Receiver with Bluetooth

2
-42.89%

$39.95

List price $69.95

Description


NVX brand icon

Authorized dealer

NVX NE121P

Single 12" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 1.75 Cu. Ft. with Polyfil and NVX Logo
Quantity: 1

Product Details:

  • Not compatible with NVX VC-Series Subwoofers
  • 12" Single Ported Subwoofer Enclosure
  • Made from 3/4" Medium Density Fiberboard (MDF) construction
  • Built with precision CNC technology for exceptional accuracy
  • Pre-lined with Poly-Fil for improved acoustic response
  • Premium Black Carpet with Black NVX Logo
  • Spring Loaded Push Terminals
  • Maximum subwoofer mounting depth: 13-7/8"
  • Subwoofer cutout diameter: 11-7/32"
  • Internal box volume: 1.75 cubic feet
  • Dimensions: 16.50" D x 20.00" W x 16.00" H
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty

Port Specifications:

  • Tuning Frequency: 38 Hz
  • Port Width: 1.5"
  • Port Height: 14.50"
  • Port Length: 17.52"

Sundown Audio SA-12 v.3 D2 12" (SA12V3D2)

3000W Peak (1500W RMS) 12" SA Series Dual 2-ohm Car Subwoofer (SAV312D2)
Quantity: 1

Product Details:

  • 12" Dual 2 ohm SA Series Subwoofer
  • Power Handling:
    • Peak: 3000 watts
    • RMS: 1500 watts
  • Competition Grade Paper Cone
  • Foam Surround
  • Vented magnetic gap and solid pole piece with vent channels
  • Innovative high velocity, cast aluminum vented frame spacer ring
  • Magnet ID faraday ring and pole cap faraday ring
  • Spring-loaded terminals for easy connection
  • Stitched-on double "XL" tinsel leads
  • 2.75" High temperature Copper voice coil on aluminum former
  • 22 mm Xmax
  • Double Stacked magnet motor structure
  • Resonance Frequency (Fs): 35 Hz
  • Sensitivity: 84.05 dB
  • Recommended sealed box volume: 1.0 cubic feet
  • Recommended ported box volume: 1.75 cubic feet
  • Top-mount depth: 8.4"
  • Cutout diameter: 11.2"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Individually


Loading...
Limited time!
46CSC654 main

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

122
-33.36%

$79.96

List price $119.99

Limited time!
46CSC6934 main

Kicker CSC693 (46CSC6934)

900W Peak (300W RMS) 6x9” CS Series 3 Way Coaxial 4-ohm Speakers with Integrated Midrange Speakers

40
-30.02%

$111.96

List price $159.99

43DSC6504 main

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

28
-10.53%

$84.99

List price $94.99

DB652 main

Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

12
-9.16%

$109.00

List price $119.99

Limited time!
Club 622 main

JBL Club 622

360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers

5
-28.58%

$99.95

List price $139.95

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
MPK 163.3 main

Hertz MPK163.3

600W Peak (300W RMS) 6.5" Mille PRO Series 3-way 4-ohm Component Speaker System

2
-14.89%

$999.99

List price $1175.00

PNW-65CS2 main

AudioControl PNW-65CS2

250W Peak (200W RMS) 6.5″ PNW Series 2 Way Component 3-ohm Speakers

4
-5.90%

$319.00

List price $339.00

SXE-6926S main

Alpine SXE-6926S

280W Peak (90W RMS) 6x9” SXE Series 2-way 4-ohm Coaxial Speakers

13
-20.84%

$56.99

List price $71.99

NSP65 main

NVX NSP65

540W Peak (180W RMS) 6.5" N-Series 2 Way Coaxial Car Speakers

93
-35.19%

$69.99

List price $107.99


Best selling similar products

P3-2X12 small

Rockford Fosgate Punch P3 P3-2X12

• Dual Punch P3 12" Loaded Subwoofer Enclosure
• 2400W Peak
• 1200W RMS
• Constructed with Durable 5/8" MDF
• High Current Binding Posts
• Durable Black Carpet Covering
• Computer Optimized Design
• 1 Ohm Final Impedance

(40)

$709.99

List price $947.99

DL7R122 small

Kicker DL7R122 (45DL7R122)

• Ported enclosure with 2 12" Solo-Baric L7R Series Subwoofer
• 1200 watts RMS (2400 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 33-3/4" L x 15-7/8" H x 15-1/4" W x 20-3/8" W2

(8)

$519.96

List price $699.99

CP112-W0v3 small

JL Audio BassWedge CP112-W0v3

• 600W Peak
• 300W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

(12)

$279.99

List price $279.99

CP210-W0v3 small

JL Audio BassWedge CP210-W0v3

•Dual 10" 10W0v3-4 Loaded Ported Enclosure
• 1200W Peak
• 600W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

(9)

$349.99

List price $349.99

47QL7R122 small

Kicker 47QL7R122

• Ported enclosure with 4 12" Solo-Baric L7R Series Subwoofer
• 2400 watts RMS (4800 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 28" L x 20-1/4" H x 35-7/8" W

(2)

$1199.96

List price $1599.99

JBLBassPro 12 small

JBL BassPro 12

• 12" Amplified Loaded Subwoofer System
• 150 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs

(1)

$364.95

List price $419.95

DL7S122 small

Kicker DL7S122 (44DL7S122)

• Ported enclosure with 2 12" Solo-Baric L7S Series Subwoofer
• 1500 watts RMS (3000 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 33-3/4" L x 16" H x 16-1/4" W x 19-1/2" W2

(14)

$849.99

List price $949.99

VL7S122 small

Kicker VL7S122 (44VL7S122)

• Ported enclosure with 1 12" Solo-Baric L7S Series Subwoofer
• 750 watts RMS (1500 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 18-3/4" L x 16" H x 14-3/4" W x 17-7/8" W2

(10)

$499.99

List price $549.99

DCWR122 small

Kicker DCWR122 (48DCWR122)

• Ported enclosure with 2 12" CompR Series Subwoofer
• 1000 watts RMS (2000 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 32-3/8" L x 16" H x 14" W x 17-1/4" W2

(2)

$439.96

List price $599.99

CP110-W0v3 small

JL Audio BassWedge CP110-W0v3

• 600W Peak
• 300W RMS
• Top-Quality MDF Construction
• Durable Dark Gray Carpet Finish
• Five-Way Binding Post Connectors
• Embroidered JL Audio Logo

(12)

$229.99

List price $229.99

Specifications & Details


Subwoofer Specifications
Series
SA Series
Subwoofer Size
12"
RMS Power Handling
1500 watts
Peak Power Handling
3000 watts
Woofer Composition
Paper
Woofer Surround
Foam
Sensitivity
84.05 dB
Subwoofer Design
Round / Circle
Enclosure Specifications
Box Type
Ported
Number of Subwoofers
1
Box Style/Shape
Square/Rectangle
Wood Thickness
3/4"
Number of Terminals
1
Terminal Type
Binding posts (banana clip ready)
Box Exterior Color
Black
Box Finish
Carpet
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details


Manufacturer:

NVX

Model Number:

NE121P_SAV312D2

Weight:

30.77lbs

Internal SKU:

ne121p_sav312d2

Internal Product ID:

228912

Customer Ratings & Reviews


NVX NE121P w/ Sundown Audio SAV312D2 thumbnail image

5 star
33%
4 star
33%
3 star
33%
2 star
0%
1 star
0%



Durability
4
Value
5
Features
5
Design
5
Usability
4.4

Customer Reviews

Sort by:

Loading...

The following review is for SAV312D2, which is a part of the bundle you are viewing.
By Onyx on March 2, 2026 Checkmark Icon Verified purchase


Nice sounding box but abit tall.

The following review is for NE121P, which is a part of the bundle you are viewing.

Great sturdy box, carpeting was nicest done only thing i disliked about it was its hight it too tall my trunk is 14.75. But this thing is 16" tall had to cuz the foam that was under the mat to make it barely fit and also re.oved the back seat...it was worth it though, im running a rf-p3d2 12"

By robinson on February 27, 2026 Checkmark Icon Verified purchase
2023 Toyota GR86


The following review is for NE121P, which is a part of the bundle you are viewing.
By Austin on February 26, 2026 Checkmark Icon Verified purchase
2010 Honda Odyssey




R-W12D4 HFi1500D PKG small

2 Alpine R-W12D4 + Hifonics HFi1500D + Belva BAK42BK Bass Package

2 12" Subwoofer Bass Package with 1500 RMS Amplifier and 4 Gauge Wiring Kit

(214)

$488.08

List price $1359.98

43DXA5001-2 small

Kicker DXA 500 Watt Monoblock Class D Subwoofer Car Audio Amplifier (2 Pack)

Kicker DXA 500 Watt Monoblock Class D Subwoofer Car Audio Amplifier (2 Pack)

(1)

$459.90

List price $499.90

C-NIS02 small

GROM Audio C-NIS02

OEM Harness to Connect GROM Aux, iPod or USB Interface to Factory Stereo for select 1997-2018 vehicles from Nissan, Infiniti

$23.99

List price $23.99

KTA-30MW, XKIT82 small

Alpine KTA-30MW with NVX 8 Gauge Amp Kit

600W Peak (300W RMS) Power Pack Series Class-D Monoblock Weather Resistant Amplifier

(60)

$499.95

List price $695.99

NE82S_48CWRT84 small

NVX NE82S w/ Kicker CWRT84 (48CWRT84)

Dual 8" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 0.80 Cu. Ft. with Polyfil and NVX Logo w/ 600W Peak (300W RMS) 8” CompRT Series Dual 4-ohm Shallow Subwoofer

(4)

$367.91

List price $515.97

CH6520 + CH6920 + CE404 small

Boss Car Speaker Chaos Sound Package

400W 4-Channel Boss CE404 Class AB Amplifier + 6.5" & 6x9" Chaos Series Coaxial Speakers

(102)

$119.93

List price $221.97

HRN-AR-EXT2 small

iDataLink Maestro HRN-AR-EXT2 Extension Harness

Connect 2-Meter Extension Harness to Relocate Maestro AR and New Amplifier

$34.99

List price $43.99

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2003 Dodge Neon

2016 Dodge Charger

2022 Lincoln Aviator

2003 Pontiac Aztek

1995 Lexus SC300

2014 Nissan Versa

1999 Dodge Stratus

1994 Mitsubishi Eclipse

2019 Audi A5 Sportback

2004 Buick Rainier

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.